from the GNU version of the Collaborative International Dictionary of English

from The Century Dictionary and Cyclopedia

n. English physiologist who conducted research into the function of neurons; 1st baron of Cambridge (1889-1997)

n. Roman Emperor who was the adoptive son of Trajan; travelled throughout his empire to strengthen its frontiers and encourage learning and architecture; on a visit to Britain in 122 he ordered the construction of Hadrian's Wall (76-138)

Adrian is interested in finding subtle hints that large bodies of water might once have flooded the northern regions of this now-dry world, hints that the Orbiter's infrared spectrometer could provide.